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參數資料
型號: TPS65920A2ZCHR
廠商: TEXAS INSTRUMENTS INC
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PBGA139
封裝: 10 X 10 MM, 0.65 MM PITCH, GREEN, PLASTIC, NFBGA-139
文件頁數: 68/115頁
文件大小: 1232K
代理商: TPS65920A2ZCHR
PreDriverD
Onboard
Chip
ClassD
(TPA2010D1...)
IN+
IN–
Closedto
external
ClassC
C /C
PL
PR
037-054
C
/C
PR.O
PL.O
R
/R
PL.O
PR.O
C
/C
PL.M
PR.M
R
/R
PR
PL
R
/R
PR.M
PL.M
SWCS037G
– MAY 2008 – REVISED APRIL 2011
6.1.1.1
Predriver Output Characteristics
Table 6-1 lists the predriver output characteristics.
Table 6-1. Predriver Output Characteristics
Parameter
Test Conditions
Min
Typ
Max
Unit
Load impedance
10
k
50
pF
Gain range (1)
Audio path
–92
30
dB
Voice path
–66
30
Absolute gain error
–1
1
dB
Peak-to-peak output voltage (0 dBFs)
Default gain (2)
1.5
VPP
Total harmonic distortion
At 0 dBFs
–80
–75
dB
Default gain (2)
At
–6 dBFs
–74
–69
Load
> 10 k // 50 pF
At
–20 dBFs
–70
–65
At
–60 dBFs
–30
–25
Default gain (3)
–90
–85
dB
Idle channel noise (20 Hz to 20 kHz, A-weighted)
Load = 10
SNR (A-weighted over 20-kHz bandwidth)
At 0 dBFs
83
88
dB
Default gain(3)
At
–60 dBFs
30
Output PSRR (for all gains)
20 Hz to 4 kHz
90
dB
20 Hz to 20 kHz
70
(1)
Audio digital filter =
–62 to 0 dB (1-dB steps) and 0 to 12 dB (6-dB steps)
Voice digital filter =
–3 to 12 dB (1-dB steps)
ARXPGA (volume control) =
–24 to 12 dB (2-dB steps)
Output driver =
–6 dB, 0 dB, 6 dB
(2)
The default gain setting assumes the ARXPGA has 0-dB gain setting (volume control) and output driver at 0-dB gain setting.
(3)
The default gain setting assumes the ARXPGA has 0-dB gain setting (volume control) and output driver at 0-dB gain setting.
6.1.1.2
External Components and Application Schematics
Figure 6-2 is a simplified schematic for the external class-D predriver.
Input resistor (RPR or RPL) sets the gain of the external class D. For TPS2010D1, the gain is defined according to the
following equation:
Gain (V/V) = 2*150*103/(RPR or RPL)
RPR or RPL > 15 k
Figure 6-2. Predriver for External Class D
56
Audio/Voice Module (TPS65930 Device Only)
Copyright
2008–2011, Texas Instruments Incorporated
focus.ti.com: TPS65930/TPS65920
相關PDF資料
PDF描述
TPS65920A2ZCH SPECIALTY CONSUMER CIRCUIT, PBGA139
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TPS65920BZCH SPECIALTY CONSUMER CIRCUIT, PBGA139
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